* {
    margin: 0;
    padding: 0;
}

body {
    background: #222;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

h1 {
    color: #333;
    font-size: 4rem;
    position: relative;
}

h1:after {
    content: "SPOTLIGHT";
    color: transparent;
    position: absolute;
    left: 0;
    top: 0;
    background: -webkit-linear-gradient(left, red, orange, yellow, green, blue, cyan, purple);
    background-clip: text;
    -webkit-background-clip: text;
    clip-path: circle(100px at 0% 50%);
    -webkit-clip-path: circle(100px at 0% 50%);
    animation: light 5s infinite;
}

@keyframes light {
    0% {
        clip-path: circle(100px at 0% 50%);
        -webkit-clip-path: circle(100px at 0% 50%);
    }
    50% {
        clip-path: circle(100px at 100% 50%);
        -webkit-clip-path: circle(100px at 100% 50%);
    }
    100% {
        clip-path: circle(100px at 0% 50%);
        -webkit-clip-path: circle(100px at 0% 50%);
    }
}